fix(SEO): change h1 behavior

-- headline h1 is can now have another title than page title
(use h1: '<headline title>' in document metadata)
-- changed document generation so that only 1 h1 is currently in page
-- all h2 get same style as h1 (see h1 class in style.css)

Closes: #CAM-1437, #CAM-1438
feat(uguide): add generated forms example img
Merge branch 'master' of github.com:camunda/docs.camunda.org
feat(userguide): docs for generated task forms

- document usage of generated Forms in userguide

related to #CAM-1395
fix(uguide): remove table maxwidth
updt(supported.env): adjust versions: jboss,kepler
feat(rest): doc form submit & rendering

related to #CAM-1395
Merge branch 'master' of https://github.com/camunda/docs.camunda.org
fix(tomcat): mention listener configuration

related to #CAM-681
chore(jboss): change jboss to 7.2, add migration-from-camunda-bpm-7.0

related to CAM-1054
updt(inst.guide): add kepler update site
fix(inst.guide): adjust URLs for eclipse distro
updt(enterprise): add web modeler install docs
fix(enterprise): adjust column header
feat(rest): additional query historic options

- add following query options to the historic activity instance:
  * startedBefore,
  * startedAfter,
  * finsihedBefore and
  * finishedAfter
Merge branch 'master' of https://github.com/camunda/docs.camunda.org
feat(rest): additional query historic options

- add following query options to the historic activity instance:
  * startedBefore,
  * startedAfter,
  * finsihedBefore and
  * finishedAfter
fix(enterprise): add correct links to admin guides
Merge branch 'master' of https://github.com/camunda/docs.camunda.org
fix(enterpise): include correct admin guide links